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Nano TiO2 coating composition capable of curing quickly at normal temperature and preparation method and coating thereof

A fast curing and composition technology, applied in the direction of coating, can solve the problems of harsh process conditions, limited use of coating films, low photocatalytic activity, etc., and achieve the effect of solving harsh process conditions

Inactive Publication Date: 2011-07-20
深圳市爱思宝科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, conventional self-cleaning photocatalytic nano-TiO 2 Titanium dioxide in the material has no fixed crystal form, and the photocatalytic activity is not high. In the later stage of film formation, high-temperature heat treatment (baking at about 500°C) is required to obtain anatase-type titanium dioxide coating film with good catalytic activity.
Therefore, traditional photocatalytic nano-TiO 2 The coating film has disadvantages such as harsh process conditions, complex equipment, large investment, and high cost in the preparation process, and the high-temperature treatment in the later stage limits the wide application of the coating film on various types of substrates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 10g of nano-TiO 2 sol and 10 g of nano-SiO 2 Put the hybrid sol with polyurethane in the reaction kettle, start the stirrer, add 50Kg of ammonium acetate under stirring, when the temperature in the reaction kettle rises to about 40°C, add 500g of water-soluble melamine resin, and continue stirring for 5-10 minutes , and heat the reactor to 85-90°C, stir at a constant temperature and low speed for 3-5 hours and then stop heating. After the temperature of the reactor drops to room temperature, remove part of the liquid in the reactor by vacuum evaporation to make TiO 2 The solid content is 0.06%-1%, that is, the rapid curing nano-TiO at room temperature can be obtained 2 Coating composition.

[0033] Take the cleaned base material, and apply the above-mentioned normal temperature fast curing nano-TiO on the surface of the glass sample by spraying or coating. 2 To coat the composition, place the glass sample under the sun at 25°C, and the coating film will be formed ...

Embodiment 2

[0036] Take 200g of nano-TiO 2 sol and 300g of nano-SiO 2 Put the hybrid sol with polyacrylate in the reaction kettle, start the stirrer, add 50g of ammonium chloride and 900g of polyethylene glycol under stirring, the temperature in the reaction kettle rises to about 40°C, and continue stirring for 5-10 Minutes, and heat the reactor to 65-80°C, stir at a constant temperature and low speed for 4-6 hours, then stop heating, wait until the temperature of the reactor drops to room temperature, and vacuum evaporate to remove part of the liquid in the reactor to make TiO 2 The solid content is 1%-5%, that is, the rapid curing nano-TiO at room temperature can be obtained 2 Coating composition.

[0037] Take the cleaned base material, and apply the above-mentioned normal temperature fast curing nano-TiO on the surface of the glass sample by spraying or coating. 2 To coat the composition, place the glass sample under the sun at 20°C, and the coating film will be formed in about 20 ...

Embodiment 3

[0039] Take 100g of nano-TiO 2 sol and 200g of nano-SiO 2 Put the hybrid sol with TVA resin in the reaction kettle, start the stirrer, add 30g of ammonia water under stirring, when the temperature in the reaction kettle rises to about 40°C, add 500g of PVA resin, continue stirring for 5-10 minutes, and Heat the reactor to 55-70°C, stir at a constant temperature and low speed for 6-8 hours and then stop heating. After the temperature of the reactor drops to room temperature, remove part of the liquid in the reactor by vacuum evaporation to make the TiO 2 The solid content is 2%-8%, that is, the rapid curing nano-TiO at room temperature can be obtained 2 Coating composition.

[0040] Take the cleaned base material, and apply the above-mentioned normal temperature fast curing nano-TiO on the surface of the glass sample by spraying or coating. 2 To coat the composition, place the glass sample under the sun at 5°C, and the coating film will be formed in about 30 minutes.

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PUM

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Abstract

The invention relates to a nano TiO2 coating composition capable of curing quickly at normal temperature, which comprises the following raw materials in part by weight: 0.01 to 20 parts of nano TiO2 sol, 0.01 to 30 parts of nano SiO2 hybrid sol or SiO2 sol, 0.05 to 5 parts of pH regulator, and 0.5 to 90 parts of assistant. The invention also provides the preparation method of the nano TiO2 coating composition and the coating obtained by construction of the composition. When the nano TiO2 coating composition provided by the invention is used, high-temperature heat treatment is not required in a coating process, and the TiO2 coating with high catalytic activity can be obtained at normal temperature or even low temperature.

Description

【Technical field】 [0001] The invention relates to the field of photocatalytic nanocomposite films, in particular to a room temperature fast curing nano-TiO 2 Coating composition and its preparation method and coating film. 【Background technique】 [0002] In 1972, Fujishim et al. discovered TiO 2 The redox reaction of water can occur on the surface, thus starting the research of photocatalytic reaction. Practice has proved that for some highly toxic and biodegradable organic pollutants, using TiO 2 The photogenerated strong oxidizing property can completely oxidize organic pollutants to H at room temperature and pressure. 2 O.CO 2 Wait for small molecules. TiO 2 It can not only treat a variety of organic pollutants, but also has a good effect on sterilization and inhibition of virus activity, and has a good effect on the removal of gaseous pollutants. It has the advantages of no pollution, high efficiency, mild reaction conditions, and wide application range. Therefore...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/00C09D7/12
Inventor 郑述
Owner 深圳市爱思宝科技发展有限公司
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